feedCurrent

Calculate current at feed for antenna or array

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    Syntax

    i = feedCurrent(object,frequency)

    Description

    i = feedCurrent(object,frequency) calculates and returns the complex current in Ampere at the feed for an antenna or array object at a specified frequency. The feed current when multiplied by the antenna impedance gives the voltage across the antenna.

    example

    Examples

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    Open Live Script

    Excite a monopole antenna using plane wave. Calculate the feed current at 75 MHz.

    h = planeWaveExcitation(Element=monopole, Direction=[1 0 0])
    h = 
  planeWaveExcitation with properties:

         Element: [1×1 monopole]
       Direction: [1 0 0]
    Polarization: [0 0 1]
      SolverType: 'MoM'


    cur = feedCurrent(h,75e6)
    cur = 
-0.0135 + 0.0135i
    Open Live Script

    Calculate the feed current of a rounded-bowtie designed for operation at 2.4 GHz.

    b  = design(bowtieRounded,2.4e9);
If = feedCurrent(b,2.4e9)
    If = 
0.0298 + 0.0010i
    Open Live Script

    Calculate the feed current of a dipole antenna designed for operation at 70 MHz and 75 MHz. 

    feedCurrent(dipole, [75e6, 70e6])
    ans = 1×2 complex

   0.0137 + 0.0000i   0.0089 - 0.0036i

    Input Arguments

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    Antenna or array to calculate the current at its feed, specified as one of these options:

    Note

    feedCurrent function does not calculate feed current for the infiniteArray object.

    Example: planeWaveExcitation

    Frequency to calculate the feed current, specified as a scalar for a single frequency or a vector for a frequency range in Hertz.

    Example: 70e6

    Data Types: double

    Output Argument

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    Complex current, returned as a 1-by-n vector in A. This value is calculated at the feed point of an antenna or array.

    Example: 0.0182 - 0.0032i

    Data Types: double
    Complex Number Support: Yes

    Version History

    Introduced in R2017a

    See Also

    Functions

    Topics